BUG: Perflib Event 1001 Posted Erroneously (242973)

RESOLUTION

There are two approaches to resolve to this problem.

If you do not have any control of the named performance monitoring extension that causes the event log error use this workaround. A custom performance monitoring tool can supply a buffer that is more than necessary for the data collection. For example, if the amount of buffer used when collecting performance data is 1028 bytes, it should supply a buffer a little larger than that. Providing a buffer size of the precisely the necessary size may cause the problem. Note that Performance Monitor that comes with Windows NT would rarely use a buffer of precise size.

If you are the author of the performance monitoring extension use this workaround. Modify the performance monitoring extension when checking for available buffer size in the Collect procedure. The event occurs if a performance monitor extension returns status ERROR_SUCCESS if the supplied buffer amount is equal to the needed buffer space. To workaround the problem, the extension can be written to return ERROR_MORE_DATA if the supplied buffer amount is less than or equal to the needed buffer space.

An example of this workaround would be to have the following code in the Collect procedure of the performance monitoring extension.

    if ( *lpcbTotalBytes <= SpaceNeeded ) {
	    *lpcbTotalBytes = (DWORD) 0;
	    *lpNumObjectTypes = (DWORD) 0;
        return ERROR_MORE_DATA;
    }